Stackable storage box



FIG. 1 is a top front perspective view of a stackable storage boxshowing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof, further illustrating aprotruding flange.

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a top plan view thereof, showing the stackable storage box inan open condition; and,

FIG. 9 is a perspective view of the stackable storage box in a furtheropen condition.

The ornamental design for stackable storage box, as shown and described.